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Do Now

Do Now. 3 minutes!. Draw the equipment set-up used for Investigate 1-5 . Include the position of the cart after rolling down the ramp. L abel the point where initial speed was measured. Label the braking distance. Homework :D. Physics to Go. TURN IT IN. Objectives 1-5. Agenda

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Do Now

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  1. Do Now 3 minutes! • Draw the equipment set-up used for Investigate1-5. Include the position of the cart after rolling down the ramp. • Label the point where initial speed was measured. • Label the braking distance.

  2. Homework :D • Physics to Go TURN IT IN

  3. Objectives 1-5 • Agenda • Do Now 5 • Braking Distance 20 • Reflecting 5 • P.E.Q 12 • WDY Think Now? 8 We are learning… • Braking distance is dependent on the negative acceleration of the vehicle (brakes, road surface) and reaction time (d=v2/2a) We will be successful when we can… • Plan and carry out an experiment to relate braking distance to initial speed • Determine braking distance • Examine accelerated motion

  4. Physics Talk Problem #5 A skateboarder has an initial velocity of 2 m/s and can brake within 10 m. Explain how this graph represents the square relationship between initial velocity and braking distance.

  5. Physics Talk d = vi2 -2a

  6. Physics Talk Problem #1 If a motorcycle traveling at 3 m/s with a negative acceleration of 2 m/s2, what is the braking distance traveled before the motorcycle comes to a stop?

  7. Physics Talk Problem #2 Now suppose the speedis doubled to 6 m/s…

  8. Physics Talk Problem #3 Now suppose the speedis tripled to 9 m/s…

  9. Physics Talk Problem #4 Now suppose the speedis halved to 1.5 m/s…

  10. Physics Talk Problem #5 Now suppose the speedis quartered to 0.75 m/s…

  11. Reflecting (page 87)

  12. P.E.Q. (page 87) 12 minutes!

  13. WDYTN? (page 86) 8 minutes! What factors must you consider to determine if you will be able to stop in the distance between you and the animal to avoid hitting it? • 4 complete sentences • Initial Speed | Breaking Distance • Positive or negative acceleration?

  14. Checking Up 4 minutes!

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